Rear Blower Motor Problems.

Hey guys. New to the site and so far love all the info. I just picked up a 95 burb with 77k miles. It's in excellent condition except for the paint peeling off in spots. It was a one owner and well kept. The problem I am having is with the blower for the rear a/c and heat. When I turn the truck off the rear motor keeps running on low speed. The only way I can make it shut off is by pulling the fuse under the hood or disconnecting the battery.:grrrrrr:

At first I didn't know what was causing the battery to die and after going out and getting a new battery and having the same issues I started lookin and found the blower motor still running. Does anyone have any ideas as to where to look. I have a strong automotive background so repair shouldn't be a problem just wondering if anyone has any clues.

Just a quick update: the blower hasn't given me any problems the last few days but I am still confused as to what the problem is. If anyone else knows anything please feel free to give me some tips....